# Cluster going RED after mapper-size plugin installed

**URL:** <https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898>\
**Category:** Elasticsearch\
**Tags:** docker\
**Created:** [July 13, 2020, 6:53am UTC](https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898 "2020-07-13T06:53:58Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![AClerk](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/aclerk/32/55297_2.png) [@AClerk](https://discuss.elastic.co/u/AClerk)\
**Post date:** [July 13, 2020, 6:53am UTC](https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898/1 "2020-07-13T06:53:59Z")

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Hello,  
elasticsearch version 7.6.2

I have installed mapper-size plugin on 3 nodes out of 5 I have in the cluster.  
Restarting each node after the installation.  
I have noticed that one index is going into RED status all the time sine installing the plugin.  
So I have deleted the plugin from node-1 and everything got back to normal.  
Also needed to close/open the indices manually, as some of them stayed in YELLOW status

Any known issues?  
Any explanations?  
What can I do to avoid this situation? Or what to do when cluster health goes RED?

Thanks

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 13, 2020, 7:00am UTC](https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898/2 "2020-07-13T07:00:26Z")

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What do the logs on that node show?

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<div class="post-metadata">

**Author:** ![AClerk](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/aclerk/32/55297_2.png) [@AClerk](https://discuss.elastic.co/u/AClerk)\
**Post date:** [July 13, 2020, 7:06am UTC](https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898/3 "2020-07-13T07:06:02Z")

</div>

Only error I see is

```auto
[2020-07-13T16:16:31,505][ERROR][i.n.u.c.D.rejectedExecution] [NODE1] Failed to submit a listener notification task. Event loop shut down?
java.util.concurrent.RejectedExecutionException: event executor terminated

```

Not sure if related.

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 13, 2020, 7:17am UTC](https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898/4 "2020-07-13T07:17:33Z")

</div>

It's more than just errors though, seeing what's happening more generally is benefical.

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<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [July 13, 2020, 7:31am UTC](https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898/5 "2020-07-13T07:31:17Z")

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I would recommend installing the plugin on all nodes in the cluster.

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<div class="post-metadata">

**Author:** ![AClerk](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/aclerk/32/55297_2.png) [@AClerk](https://discuss.elastic.co/u/AClerk)\
**Post date:** [July 13, 2020, 8:10am UTC](https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898/6 "2020-07-13T08:10:29Z")

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@Christian_Dahlqvist  
That was my goal.  
However, I am doing it gradually, one node after the other.  
But when issues has started, I rolled back.

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<div class="post-metadata">

**Author:** ![AClerk](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/aclerk/32/55297_2.png) [@AClerk](https://discuss.elastic.co/u/AClerk)\
**Post date:** [July 13, 2020, 8:11am UTC](https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898/7 "2020-07-13T08:11:17Z")

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@warkolm  
Anything specific to look for?  
It's a huge log file...

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 10, 2020, 8:19am UTC](https://discuss.elastic.co/t/cluster-going-red-after-mapper-size-plugin-installed/240898/8 "2020-08-10T08:19:57Z")

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